World population keeps increasing. Humanity spreads all over the world just like a cancer, causes other species to go extinct, and changes the face of the earth. It was easy before civilization. And it still is, in the nature. Population increases geometrically (2,4,8,16,…), but food supply, or resources either don’t increase, or they increase arithmetically (1,2,3,4,…). This means more living beings than the resources could support, and the result is the survival of the fittest. The ones that fit the environment better or have advantages tend to survive, and the others die. And as many people know, this is the …